That's the default if you're missing the hidapi dependency... (README)
There is no hidapi.pc there is a /usr/local/src/hidapi/pc/hidapi.pc.in
configure:10620: checking for hidapi
configure:10627: $PKG_CONFIG --exists --print-errors "$_hidapi_lib"
Package hidapi was not found in the pkg-config search path.
Perhaps you should add the directory containing `hidapi.pc'
No package 'hidapi' found
configure:10644: $PKG_CONFIG --exists --print-errors "$_hidapi_lib"
Package hidapi was not found in the pkg-config search path.
Perhaps you should add the directory containing `hidapi.pc'
No package 'hidapi' found
No package 'hidapi' found
configure:10620: checking for hidapi
configure:10627: $PKG_CONFIG --exists --print-errors "$_hidapi_lib"
configure:10644: $PKG_CONFIG --exists --print-errors "$_hidapi_lib"
ac_cv_env_hidapi_CFLAGS_set=
ac_cv_env_hidapi_CFLAGS_value=
ac_cv_env_hidapi_LIBS_set=
ac_cv_env_hidapi_LIBS_value=
pkg_cv_hidapi_CFLAGS='-I/usr/local/include/hidapi '
pkg_cv_hidapi_LIBS='-L/usr/local/lib -lhidapi-hidraw '
hidapi_CFLAGS='-I/usr/local/include/hidapi '
hidapi_LIBS='-L/usr/local/lib -lhidapi-hidraw '